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Contents
# frozen_string_literal: true
RSpec.describe TTY::Reader, '#subscribe' do
let(:input) { StringIO.new }
let(:output) { StringIO.new }
let(:env) { { "TTY_TEST" => true } }
it "subscribes to receive events" do
stub_const("Context", Class.new do
def initialize(events)
@events = events
end
def keypress(event)
@events << [:keypress, event.value]
end
end)
reader = TTY::Reader.new(input: input, output: output, env: env)
events = []
context = Context.new(events)
reader.subscribe(context)
input << "aa\n"
input.rewind
answer = reader.read_line
expect(answer).to eq("aa\n")
expect(events).to eq([
[:keypress, "a"],
[:keypress, "a"],
[:keypress, "\n"]
])
events.clear
reader.unsubscribe(context)
input.rewind
answer = reader.read_line
expect(events).to eq([])
end
it "subscribes to listen to events only in a block" do
stub_const("Context", Class.new do
def initialize(events)
@events = events
end
def keypress(event)
@events << [:keypress, event.value]
end
end)
reader = TTY::Reader.new(input: input, output: output, env: env)
events = []
context = Context.new(events)
input << "aa\nbb\n"
input.rewind
reader.subscribe(context) do
reader.read_line
end
answer = reader.read_line
expect(answer).to eq("bb\n")
expect(events).to eq([
[:keypress, "a"],
[:keypress, "a"],
[:keypress, "\n"]
])
end
end
Version data entries
8 entries across 8 versions & 2 rubygems